CN110529213A - Exhaust cam and engine with it - Google Patents
Exhaust cam and engine with it Download PDFInfo
- Publication number
- CN110529213A CN110529213A CN201910904579.7A CN201910904579A CN110529213A CN 110529213 A CN110529213 A CN 110529213A CN 201910904579 A CN201910904579 A CN 201910904579A CN 110529213 A CN110529213 A CN 110529213A
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- China
- Prior art keywords
- section
- work
- cam
- buffering
- exhaust
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/08—Shape of cams
Abstract
The invention discloses a kind of exhaust cam and with its engine.The cam profile of the exhaust cam includes: basic circle and cam part, and two endpoints of basic circle are overlapped with two endpoints of cam part respectively, two endpoints of cam part are to open endpoint and closing endpoint respectively, cam part includes buffer starting section, section is opened in work, section is closed in work, buffering closes section, buffer starting section is connected with endpoint is opened, buffering closes section and is connected with endpoint is closed, section is opened in work, work closes section and is located at buffer starting section, buffering is closed between section, and work opens section and is connected with buffer starting section, work closes section and is connected with buffering closing section.Exhaust cam according to the present invention, reasonable optimization design has been carried out to cam profile, the opening and closing of exhaust cam control exhaust valve, cam profile after optimization can control exhaust valve and exhaust inertia made full use of to improve exhaust efficiency, to realize that engine has the advantages that high power per liter, low oil consumption.
Description
Technical field
The present invention relates to engine arts, in particular to a kind of exhaust cam and with its engine.
Background technique
The cam profile used on existing small displacement engine does not carry out reasonable optimization design, undesirable cam type
Line, which designs, will lead to engine exhaust low efficiency, power, torque decline, components insufficient lubrication, exhaust cam inordinate wear, very
To will lead to valve actuating mechanism occur flying off with valve rebound phenomenon, and then cause HP, hp/litre is low, oil consumption is high, performance not
It is good.
Summary of the invention
The present invention is directed to solve one of above-mentioned technical problem in the prior art at least to a certain extent.For this purpose, this hair
It is bright to propose a kind of exhaust cam, reasonable optimization design has been carried out to cam profile, has improved the performance of engine.
The invention also provides a kind of engines with above-mentioned exhaust cam.
The cam profile of exhaust cam according to an embodiment of the present invention includes: basic circle and cam part, and the basic circle
Two endpoints are overlapped with two endpoints of the cam part respectively, and two endpoints of the cam part are to open endpoint respectively
With closing endpoint, the cam part includes buffer starting section, section is opened in work, section is closed in work, is buffered and is closed section, described slow
It washes open and opens section and be connected with the unlatching endpoint, the buffering closes section and is connected with the closing endpoint, work the unlatching section, work
Make closing section to be located between the buffer starting section, buffering closing section, and section and the buffer starting are opened in the work
Duan Xianglian, the work close section and are connected with buffering closing section, and the cornerite that section is opened in the work is 53 °~59 °, described
The cornerite that section is closed in work is 57 °~63 °.
Exhaust cam according to an embodiment of the present invention has carried out reasonable optimization design, exhaust cam control to cam profile
The opening and closing of exhaust valve processed, the cam profile after optimization can control exhaust valve and exhaust inertia made full use of to improve exhaust effect
Rate, to realize that engine has the advantages that high power per liter, low oil consumption, can substantially improve the dynamic property of engine, economy,
Discharge and reliability.
According to some embodiments of the present invention, it is straightway that the buffer starting section, the buffering, which close section, the work
Make to open section and/or the work is closed in section with negative cruvature section.
Further, section is opened in the work, the work closes the junction of section as valve maximum lift point, and valve is most
High-lift is 3mm~4mm.
According to some embodiments of the present invention, the radius of the basic circle is 15mm~16mm.
According to some embodiments of the present invention, the cornerite of the buffer starting section is 12 °~18 °, the buffer starting section
Lift be 0.1mm~0.2mm；The cornerite that the buffering closes section is 13 °~19 °, and the lift that the buffering closes section is
0.1mm~0.2mm.
According to some embodiments of the present invention, the maximum positive acceleration of the cam profile is 4.5mm/s2~5.5mm/s2,
And positive acceleration width range is 8 °~15 °.
According to some embodiments of the present invention, the maximum deceleration of the cam profile is 2mm/s2~2.2mm/s2, and
Negative acceleration width range is 80 °~95 °.
According to some embodiments of the present invention, the maximum cushioning acceleration of the cam profile is 1.5mm/s2~3mm/s2。
Further, the negative cruvature radius of the negative cruvature section is greater than 200mm.
The engine of embodiment according to a further aspect of the invention, including above-mentioned exhaust cam.
Possessed advantage is identical compared with the existing technology with above-mentioned exhaust cam for the engine, no longer superfluous herein
It states.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the schematic diagram of exhaust cam；
Fig. 2 is another schematic diagram of exhaust cam；
Fig. 3 is crank angle and valve lift diagram；
Fig. 4 is crank angle and valve speed curve diagram；
Fig. 5 is crank angle and valve acceleration curve graph；
Fig. 6 is exhaust cam radius of curvature curve graph；
Fig. 7 is exhaust cam-roller pressue-graph.
Appended drawing reference:
Basic circle 1, cam part 2, buffer starting section 3, section 4 is opened in work, section 5 is closed in work, buffering closes section
6, negative cruvature section 7, arc section 8.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected or can communicate with each other；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the interaction relationship of connection or two elements inside two elements.For the ordinary skill in the art,
The specific meanings of the above terms in the present invention can be understood according to specific conditions.
Exhaust cam according to an embodiment of the present invention is described in detail below with reference to Fig. 1-Fig. 7.
Shown in referring to Fig.1, the cam profile of exhaust cam includes: basic circle 1 and cam part 2,1 center of circle of basic circle and cam peach
2 center of portion is overlapped, and coincidence point is O point, and two endpoints of basic circle 1 are overlapped with two endpoints of cam part 2 respectively, cam peach
Two endpoints in portion 2 respectively be open endpoint a and close endpoint b, cam part 2 include buffer starting section 3, work open section 4,
Section 5 is closed in work, buffering closes section 6, and buffer starting section 3 is connected with endpoint a is opened, and buffering closes section 6 and closes endpoint b phase
Even, it works and opens section 4, work is closed section 5 and is located between buffer starting section 3, buffering closing section 6, and works and open section 4 and buffering
It opens section 3 to be connected, work closing section 5 closes section 6 with buffering and is connected, and it is 53 °~59 ° that the wrap angle 1 of section 4 is opened in work, preferably
56 °, the wrap angle 2 that section 5 is closed in work is 57 °~63 °, preferably 60 °.
Exhaust cam according to the present invention has carried out reasonable optimization design, exhaust cam control exhaust to cam profile
The opening and closing of door, the cam profile after optimization can control exhaust valve and exhaust inertia made full use of to improve exhaust efficiency, from
And realize that engine has the advantages that high power per liter, low oil consumption, the dynamic property, economy, discharge of engine can be substantially improved
And reliability.
Shown in referring to Figures 1 and 2, it is straightway that buffer starting section 3, buffering, which close section 6, and section 4 and/or work are opened in work
Make to close and there is negative cruvature section 7 in section 5.
Specifically, it since the lift of buffer starting section 3 is smaller, is not easy to realize the function of negative cruvature section 7, negative cruvature section 7
Setting opens section 4 in work and/or work is closed in section 5, it is ensured that when exhauxt valve opens, circulation interface is increased rapidly, and is given up
Gas can quickly be discharged, and loss of having stretched tight is small, and economy is high.
In the embodiment shown in Figure 2, negative cruvature section 7 is located at work and opens in section 4 and work closing section 5.It is some not
In the embodiment shown, negative cruvature section 7 can also be only located at work and open in section 4, or is only located at work and closes in section 5.
Shown in referring to Fig.1, section 4 is opened in work, the junction of work closing section 5 is valve maximum lift point c, and valve is maximum
Lift is 3mm~4mm, and preferably 3.5491mm, cam lift is that basic circle center of circle O subtracts basic circle half at a distance from putting on cam profile
The length of diameter, cam maximum lift are the length that c point subtracts base radius at a distance from O point, cam maximum lift 3.5491mm
Be conducive to make full use of exhaust inertia, improve exhaust efficiency.
Shown in referring to Fig.1, the radius of basic circle 1 is 15mm~16mm, preferably 15.45mm, and 1 radius of basic circle is selected in 15~16mm
When range, the abrasion loss of exhaust cam is less than 50um and improves making for exhaust cam to advantageously reduce the abrasion of exhaust cam
Use the service life.
Shown in referring to Fig.1, the wrap angle 3 of buffer starting section 3 is 12 °~18 °, and preferably 15 °, the lift of buffer starting section 3 is
0.1mm~0.2mm, preferably 0.12mm；The cornerite that buffering closes section 6 is 13 °~19 °, and preferably 15 °, buffering closes the lift of section 6
For 0.1mm~0.2mm, preferably 0.16mm.
In some embodiments of the invention, the maximum positive acceleration of cam profile is 4.5mm/s2~5.5mm/s2, preferably
5.2mm/s2Or 5.1mm/s2, and positive acceleration width range is 8 °~15 °, preferably 10 °.
Shown in referring to Fig.1, the maximum deceleration of cam profile is 2mm/s2~2.2mm/s2, preferably 2.11mm/s2, and
Negative acceleration width range is 80 °~95 °, preferably 90 °.
Shown in referring to Fig.1, the maximum cushioning acceleration of cam profile is 1.5mm/s2~3mm/s2, preferably 2.3mm/s2。
Shown in referring to Figures 1 and 2, the negative cruvature radius of negative cruvature section is greater than 200mm, preferably 415.8mm, to realize processing
When negative cruvature section 7, grinding wheel and exhaust cam are in surface contact state, to be conducive to exhaust cam grinding conveniently, reduction is processed into
Originally, machining accuracy is improved.
The engine of embodiment according to a further aspect of the invention, the exhaust cam including above-described embodiment, is tested through overtesting
Card, which is mounted on 1.3L supercharged direct-injection engine, and engine can be made in middle low speed (such as 1500rpm-
Within the scope of 4500rpm) torque reaches 230N*m, while still reaching the practical mesh of rated power 125kW in high speed 6000rpm
Mark, that is to say, that peak torque is between 1500rpm-4500rpm, it is ensured that climbing capacity, and maximum power is generally most
High revolving speed, it is ensured that the power of automobile.The exhaust cam may insure that 1.3L supercharged direct-injection engine is realized greatly in high speed
Power, while large torque is realized in low speed, guarantee that cam work is without exception.
In some embodiments of the invention, pass through analogue simulation, crank angle and valve lift diagram such as Fig. 3 institute
Show, crank angle is with valve speed curve diagram as shown in figure 4, crank angle and valve acceleration curve graph are as shown in figure 5, exhaust
Cam curvature radius curve graph as shown in fig. 6, exhaust cam-roller pressue-graph as shown in fig. 7, as shown in Fig. 3-Fig. 7, this
Face amount and fullness coefficient when the design of the cam profile of invention guarantees to obtain as big as possible, to improve exhaust efficiency, it is ensured that
Accelerating curve is continuous, without mutation, and it is abnormal can to occur in use inordinate wear, valve actuating mechanism to avoid exhaust cam
The problems such as.
In some embodiments of the invention, cam profile open side lift table is as shown in table 1, cam profile close side liter
Journey table is as shown in table 2:
Table 1: cam profile open side lift table
Table 2: cam profile close side lift table
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means particular features, structures, materials, or characteristics described in conjunction with this embodiment or example
It is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms need not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.In addition, those skilled in the art can illustrate this
Different embodiments or examples described in book are engaged and are combined.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of exhaust cam, which is characterized in that the cam profile of the exhaust cam includes: basic circle and cam part, and institute
Two endpoints for stating basic circle are overlapped with two endpoints of the cam part respectively, and two endpoints of the cam part are respectively
It opens endpoint and closes endpoint, the cam part includes buffer starting section, section is opened in work, section is closed in work, buffering is closed
Section, the buffer starting section are connected with the unlatching endpoint, and the buffering closes section and is connected with the closing endpoint, the work
Open section, work close section be located at the buffer starting section, the buffering closing section between, and the work unlatching section with it is described
Buffer starting section is connected, and the work, which closes section and closes section with the buffering, to be connected, the cornerite of the work unlatching section for 53 °~
59 °, the cornerite that section is closed in the work is 57 °~63 °.
2. exhaust cam according to claim 1, which is characterized in that the buffer starting section, the buffering close Duan Jun
For straightway, section is opened in the work and/or the work is closed in section with negative cruvature section.
3. exhaust cam according to claim 2, which is characterized in that section is opened in the work, section is closed in the work
Junction is valve maximum lift point, and valve maximum lift is 3mm~4mm.
4. exhaust cam according to claim 1, which is characterized in that the radius of the basic circle is 15mm~16mm.
5. exhaust cam according to claim 1, which is characterized in that the cornerite of the buffer starting section is 12 °~18 °,
The lift of the buffer starting section is 0.1mm~0.2mm；The cornerite that the buffering closes section is 13 °~19 °, and the buffering is closed
The lift for closing section is 0.1mm~0.2mm.
6. exhaust cam according to claim 1, which is characterized in that the maximum positive acceleration of the cam profile is
4.5mm/s2~5.5mm/s2, and positive acceleration width range is 8 °~15 °.
7. exhaust cam according to claim 1, which is characterized in that the maximum deceleration of the cam profile is 2mm/
s2~2.2mm/s2, and negative acceleration width range is 80 °~95 °.
8. exhaust cam according to claim 1, which is characterized in that the maximum cushioning acceleration of the cam profile is
1.5mm/s2~3mm/s2。
9. exhaust cam according to claim 2, which is characterized in that the negative cruvature radius of the negative cruvature section is greater than
200mm。
10. a kind of engine, which is characterized in that including exhaust cam according to claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910904579.7A CN110529213A (en) | 2019-09-24 | 2019-09-24 | Exhaust cam and engine with it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910904579.7A CN110529213A (en) | 2019-09-24 | 2019-09-24 | Exhaust cam and engine with it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110529213A true CN110529213A (en) | 2019-12-03 |
Family
ID=68669938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910904579.7A Pending CN110529213A (en) | 2019-09-24 | 2019-09-24 | Exhaust cam and engine with it |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110529213A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405395A (en) * | 2022-10-08 | 2022-11-29 | 中车资阳机车有限公司 | Camshaft based on Miller cycle technology and 280 diesel engine |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693681A (en) * | 2005-04-30 | 2005-11-09 | 重庆大学 | Cam of distributing mechanism of motorcycle engine |
| CN2793334Y (en) * | 2005-05-13 | 2006-07-05 | 晏家全 | Air intaking and exhausting cam on cam shaft of IC engine |
| CN101158296A (en) * | 2007-11-19 | 2008-04-09 | 重庆大学 | Cam axle underneath type valve mechanism of motorcycle engine |
| CN102071981A (en) * | 2011-01-31 | 2011-05-25 | 重庆长安汽车股份有限公司 | Automobile engine air distribution cam suitable for variable two-stage air valve lift |
| CN201972751U (en) * | 2010-12-31 | 2011-09-14 | 上汽通用五菱汽车股份有限公司 | Exhaust cam of miniature gasoline engine |
| CN202832687U (en) * | 2012-08-20 | 2013-03-27 | 三一重工股份有限公司 | Cam mechanism, camshaft, engine and engineering machinery |
| CN103362582A (en) * | 2012-03-30 | 2013-10-23 | 广西玉柴机器股份有限公司 | Engine cam shaft inlet cam |
| CN203296844U (en) * | 2013-05-20 | 2013-11-20 | 北汽福田汽车股份有限公司 | Exhaust cam used for engines and air inlet cam used for engines |
| CN203374335U (en) * | 2013-06-21 | 2014-01-01 | 华晨鑫源重庆汽车有限公司 | Cam shaft profile structure |
| CN203669951U (en) * | 2014-01-08 | 2014-06-25 | 长春一汽四环发动机制造有限公司 | Gas distribution cam profile of natural gas engine for automobile |
| CN203925637U (en) * | 2014-07-07 | 2014-11-05 | 重庆长安汽车股份有限公司 | The petrolic exhaust cam of a kind of natural aspiration |
| CN104405464A (en) * | 2014-10-31 | 2015-03-11 | 力帆实业(集团)股份有限公司 | Exhaust cam of pressurizing type gasoline direct injection engine |
| CN204238998U (en) * | 2014-10-31 | 2015-04-01 | 力帆实业(集团)股份有限公司 | A kind of exhaust cam of supercharging directly jetting gasoline engine |
| CN205638590U (en) * | 2016-05-10 | 2016-10-12 | 力帆实业(集团)股份有限公司 | Vehicle engine symmetry exhaust cam structure |
| CN106837455A (en) * | 2017-03-23 | 2017-06-13 | 湖南长丰动力有限责任公司 | A kind of admission cam of 1.5L turbo-charged direct injections gasoline engine |
| CN106837454A (en) * | 2017-03-23 | 2017-06-13 | 湖南长丰动力有限责任公司 | A kind of 1.5L is pressurized the exhaust cam of directly jetting gasoline engine |
| CN207526541U (en) * | 2017-11-14 | 2018-06-22 | 浙江骏融汽车零部件有限公司 | A kind of exhaust cam shaft of in-line four cylinder turbocharged engine |
| CN108223035A (en) * | 2017-12-30 | 2018-06-29 | 潍柴动力股份有限公司 | A kind of design of cam contour line method |
| CN207761723U (en) * | 2018-01-15 | 2018-08-24 | 中国第一汽车股份有限公司 | A kind of asymmetric exhaust cam |
-
2019
- 2019-09-24 CN CN201910904579.7A patent/CN110529213A/en active Pending
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1693681A (en) * | 2005-04-30 | 2005-11-09 | 重庆大学 | Cam of distributing mechanism of motorcycle engine |
| CN2793334Y (en) * | 2005-05-13 | 2006-07-05 | 晏家全 | Air intaking and exhausting cam on cam shaft of IC engine |
| CN101158296A (en) * | 2007-11-19 | 2008-04-09 | 重庆大学 | Cam axle underneath type valve mechanism of motorcycle engine |
| CN201972751U (en) * | 2010-12-31 | 2011-09-14 | 上汽通用五菱汽车股份有限公司 | Exhaust cam of miniature gasoline engine |
| CN102071981A (en) * | 2011-01-31 | 2011-05-25 | 重庆长安汽车股份有限公司 | Automobile engine air distribution cam suitable for variable two-stage air valve lift |
| CN103362582A (en) * | 2012-03-30 | 2013-10-23 | 广西玉柴机器股份有限公司 | Engine cam shaft inlet cam |
| CN202832687U (en) * | 2012-08-20 | 2013-03-27 | 三一重工股份有限公司 | Cam mechanism, camshaft, engine and engineering machinery |
| CN203296844U (en) * | 2013-05-20 | 2013-11-20 | 北汽福田汽车股份有限公司 | Exhaust cam used for engines and air inlet cam used for engines |
| CN203374335U (en) * | 2013-06-21 | 2014-01-01 | 华晨鑫源重庆汽车有限公司 | Cam shaft profile structure |
| CN203669951U (en) * | 2014-01-08 | 2014-06-25 | 长春一汽四环发动机制造有限公司 | Gas distribution cam profile of natural gas engine for automobile |
| CN203925637U (en) * | 2014-07-07 | 2014-11-05 | 重庆长安汽车股份有限公司 | The petrolic exhaust cam of a kind of natural aspiration |
| CN104405464A (en) * | 2014-10-31 | 2015-03-11 | 力帆实业(集团)股份有限公司 | Exhaust cam of pressurizing type gasoline direct injection engine |
| CN204238998U (en) * | 2014-10-31 | 2015-04-01 | 力帆实业(集团)股份有限公司 | A kind of exhaust cam of supercharging directly jetting gasoline engine |
| CN205638590U (en) * | 2016-05-10 | 2016-10-12 | 力帆实业(集团)股份有限公司 | Vehicle engine symmetry exhaust cam structure |
| CN106837455A (en) * | 2017-03-23 | 2017-06-13 | 湖南长丰动力有限责任公司 | A kind of admission cam of 1.5L turbo-charged direct injections gasoline engine |
| CN106837454A (en) * | 2017-03-23 | 2017-06-13 | 湖南长丰动力有限责任公司 | A kind of 1.5L is pressurized the exhaust cam of directly jetting gasoline engine |
| CN207526541U (en) * | 2017-11-14 | 2018-06-22 | 浙江骏融汽车零部件有限公司 | A kind of exhaust cam shaft of in-line four cylinder turbocharged engine |
| CN108223035A (en) * | 2017-12-30 | 2018-06-29 | 潍柴动力股份有限公司 | A kind of design of cam contour line method |
| CN207761723U (en) * | 2018-01-15 | 2018-08-24 | 中国第一汽车股份有限公司 | A kind of asymmetric exhaust cam |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115405395A (en) * | 2022-10-08 | 2022-11-29 | 中车资阳机车有限公司 | Camshaft based on Miller cycle technology and 280 diesel engine |
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Application publication date: 20191203 |